Formation of unusual Cr5+ charge state in CaCr0.5Fe0.5O3 perovskite

Formation of unusual Cr⁵⁺ charge state in CaCr_0.5Fe_0.5O₃ perovskite

Dai Jian-Hong^{1, 2}, Zhao Qing¹, Sun Qian¹, Zhang Shuo³, Wang Xiao^{1, 2}, Shen Xu-Dong^{1, 2}, Liu Zhe-Hong^{1, 2}, Shen Xi^{1, 2}, Yu Ri-Cheng¹, Chan Ting-Shan⁴, Li Lun-Xiong⁵, Zhou Guang-Hui⁶, Yang Yi-feng^{1, 2, †}, Jin Chang-Qing^{1, 2}, Long You-Wen^{1, 2, ‡}

(color online) X-ray diffraction pattern and structure refinement results of CaCr_0.5Fe_0.5O₃. The observed (circles), calculated (line), and difference (bottom line) are shown. The top ticks indicate the allowed Bragg reflections of CCFO with space group Pbnm. The bottom ticks indicate the impurity phase of CaFe₂O₄. The two-phase refinement shows that the amount of impurity phase is 4.1 wt.%.